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PEMBUATAN GRANUL SLOW RELEASE FERTILIZER MENGGUNAKAN LATEKS-KITOSAN SEBAGAI BAHAN BINDER ALAMI YANG RAMAH LINGKUNGAN Hamzah, Moh.; Kalembang, Eryanti; Fitriani, Diah Ayu; Astuti, Dwi
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Vol 7 No 1 (2019): Volume 7, Nomor 1, 2019
Publisher : Magister Program of Applied Chemistry, Udayana University, Bali-INDONESIA

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Abstract

Tujuan inovasi dalam teknologi pembuatan pupuk slow release (SRF) adalah untuk meningkatkan efisiensi dengan mengendalikan pelepasan hara pupuk. Metode pengendalian pelepasan unsur hara pupuk dalam penelitian ini adalah dengan memanfaatkan lateks-kitosan sebagai pengikat dalam proses pembuatan pupuk granul NPK 16-16-16 SRF. Uji perendaman untuk waktu tertentu untuk pupuk granul SRF diperlukan untuk menentukan ketahanan terhadap tekanan air selama waktu tertentu dan metode perkolasi digunakan untuk menguji jumlah pelepasan hara N dari pupuk granul SRF NPK 16-16-16. Didapatkan bahwa waktu ketahanan pupuk granul SRF NPK 16-16-16 terhadap tekanan air dalam uji perendaman selama 6 bulan tidak hancur, dan karakteristik pelepasan hara N dari pupuk granul SRF NPK 16-16-16 yang menggunakan pengikat lateks-kitosan sebagai pengikat dengan rasio 0: 100 adalah sekitar 45.193 miligram (28,25%), 20:80 adalah 37.444 miligram (23,40%) dan 40:60 adalah 32.262 miligram (20,16%) selama 1 bulan. Disimpulkan bahwa pelepasan jumlah hara N dari pupuk granul SRF NPK 16-16-16 dengan latex-chitosan 0: 100 lebih tinggi dibandingkan dengan latex-chitosan 20:80 dan 40:60. Variasi dalam jumlah lateks dalam formula lateks-kitosan dapat mempengaruhi pelepasan nutrisi N. The aim of innovation in the technology of making slow release fertilizer (SRF) is to improve efficiency by controlling the release of fertilizer nutrients. The method of controlling the releasing fertilizer nutrients in this study was by utilizing latex-chitosan as a binder in the process of making 16-16-16 SRF NPK granular fertilizer. The immersion test for a certain time to SRF granular fertilizer was required to determine the resistance to water pressure for a certain time and the percolation method was used for testing the amount of N nutrient release from SRF NPK 16-16-16 granular fertilizer. The time of SRF NPK 16-16-16 granular fertilizer resistance to water pressure in immersion test for 6 months was not broken, dan the N release characteristics of SRF NPK 16-16-16 granular fertilizer that using latex-chitosan as binder with ratio 0:100 was about 45,193 milligrams (28.25%) , 20:80 was 37,444 milligrams (23.40%) and 40:60 was 32,262 milligrams (20.16%) for 1 month. It was concluded that the release of N amount from SRF NPK 16-16-16 granular fertilizer with latex-chitosan 0: 100 was higher than that of latex-chitosan 20:80 and 40:60. Variations in the amount of latex in the latex-chitosan formula can adjust the release of N nutrients.
PENGKAJIAN PENGARUH PENAMBAHAN MATERIAL KITOSAN PADA MUTU KARET ALAM Hamzah, Moh; Saputra, Dita Adi; Fitriani, Diah Ayu
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Vol 6 No 1 (2018): Volume 6, Nomor 1, 2018
Publisher : Magister Program of Applied Chemistry, Udayana University, Bali-INDONESIA

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Abstract

ABSTRAK: Dibandingkan dengan Thailand dan Malaysia, mutu karet berstandar di Indonesia belum konsisten sehingga mengakibatkan efisiensi pengolahan karet kering menjadi rendah dan berpengaruh lemahnya daya saing global. Aspek aspek yang mempengaruhi mutu karet alam antara lain adanya; asam lemak, pencoklatan, aroma tak sedap dan ion logam. Pengkajian ini ditujukan untuk penelitian awal material kitosan pada karet alam dimana pencampuran dua polimer biasanya menghasilkan bahan baru yang diharapkan memiliki karakteristik lebih baik daripada dengan satu polimer tunggal. Beberapa penelitan secara terpisah menunjukkan bahwa material kitosan berkemampuan mereduksi asam lemak, pencoklatan, aroma tak sedap dan ion logam. Diharapkan penambahan kitosan tidak hanya mengatasi aspek tersebut di atas tapi juga untuk eksplorasi nilai karakteristik karet alam. Hasil penelitian penambahan kitosan 5% pada fasa lateks karet alam didapatkan bahwa secara kasat mata mampu mereduksi proses pencoklatan yang ditunjukkan warna karet alam-kitosan yang lebih cerah dan aromanya lebih ringan dari pada karet alam tanpa penambahan kitosan. Kemudian pada pengujian karakteristik mekanikal (tensile strength) vulkanisat dengan perlakuan ageing (pengusangan) pada spesimen di dalam oven pada temperatur 700C dan perendaman dalam cairan minyak (kerosene) selama 48 jam didapatkan bahwa karakteristik mekanikal vulkanisat meningkat dibandingkan dengan karet alam tanpa kitosan. Sebaliknya tidak terdapat perbedaan yang begitu jauh pada kedua jenis spesimen dalam pengujian karateristik mekanikalnya. Kata kunci : karet alam, lateks, kitosan, pencoklatan, mutu. ABSTRACT: The quality of standardized rubber in Indonesia compared to Thailand and Malaysia has not been consistent, resulting low efficiency in rubber processing and impacts on the weakness of global competitiveness. The aspects that affect the quality of natural rubber (NR) among others; fatty acids, browning, odor and metal ions. This assessment is aimed as a initial research of chitosan in natural rubber where mixing of two polymers typically produces new materials which are expected to have better characteristics than with a single polymer. Several studies show that chitosan material is capable of reducing fatty acids, browning, odor and metal ions. It is hoped that the addition of chitosan will not only meet the above aspects but also to explore the value of natural rubber characteristics. The results of the addition of 5% chitosan in latex phase of natural rubber found that can reduce the browning process indicated by the color of natural-rubber-chitosan which is brighter and the aroma is lighter than the natural rubber without the addition of chitosan. The testing the mechanical characteristic (tensile strength) of its vulkanizat with the treatment of aging on the specimen in the oven at a temperature of 700C and immersion in oil (kerosene) for 48 hours show that the mechanical characteristics of volcanicate increased compared with natural rubber without chitosan. Conversely, there is no significant difference in the two types of specimens in the test of their mechanical characteristics.
Design of Monitoring System Step Walking With MPU6050 Sensor Based Android Fitriani, Diah Ayu; Andhyka, Wahyu; Risqiwati, Diah
JOINCS (Journal of Informatics, Network, and Computer Science) Vol 1, No 1 (2017): Journal Of Informatics, Network and Computer Science
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (420.736 KB) | DOI: 10.21070/joincs.v1i1.799

Abstract

Walking is said to increase endurance, burn calories and improve cardiovascular health. To monitor the steps when walking, we need a tool that is a gyroscope sensor MPU6050. Making this tool uses a gyroscope sensor for monitoring footsteps because Gyroscope is used to measure or determine the orientation of an object based on the provisions of angular momentum. This tool has been tested by foot with a number of different steps. The device test carried out by one person testers.Data obtained from these tests resulting from the detection lower limit value and upper limit value of X axis angle data is used in data processing is the value of the X-axis is converted into a sine wave form chart. To detect footsteps, each wave has the upper value limit is 20o and the bottom value is -20o. Once the step is detected, these measures will be multiplied by the width of the foot when walking, then obtained distance